Air furnace



C. MALLoRY- AIR FURNACE` Feb. 13, 1940.

Filed oct. 5, 19:58

5 SheepKs-Sheet '1 .@@CJ Vy@ 0@ QJ @D Feb. 13, 1940.

C. MALLORY AIR FURNACE Filed Oct. 3. 1938 3 Sheets-Sheet 2 Patented Feb.13, 1940 UNITED 4STATES PATENT OFFICE 4 Claims.

This invention appertains to new and useful improvements in air heatingplants and more particularly to an air furnace. y

The principal object of the present invention is I to provide anair'furnace constructed in such a manner as to have a higher degree ofetllciency than furnaces now generally employed' in heating plants.

Another important object of the invention is II to provide an airfurnace for air heating systems wherein the heat can be regulated at thefurnace in a desirable and convenient manner.

These and other important objects and advantages of the invention willbecome apparent to the Il reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the furnace.

Figure 2 is a vertical sectional view.

l Figure 3 is a section on line 3--3 of Figure 1.

Figure 4 is a. sectional view takensubstantiallyy on line 4-4 of Figure2.

Figure 5 is a sectional view taken substantially on line 5'5 of Figure2.

I Referring to the drawings wherein like numer als designate like parts,lt can be seen that numeral 5 generally refers to the shell whichconsists of the side walls 8 6, the front wall 1 and the rear wall 8.

I In the shell 5 are the vertically disposed internal shells 9 and lli,these shells being spaced from each other and from the end and sidewalls, so that air is in contact with all external surfaces thereof.

35 The upper opposed portions of the shells 9 and Il are open butnormally closed by the headers I I and I 2 between which extend the fluetubes I3. There isl preferably a multiplicity of these tubes so that airpassing upwardly in the direction of 40 the arrows must follow atortuous path through the spaces between the tubes.

In the lower portion of the shell 9 is the flrebox I4, the grate I5 andthe ashpit I5. The ashpit I6 has the door I1 while the rebox I4 has the45 fuel door Il. In the upper portion of the shell 9 is the heat chamberI9 and the upper portion of this has the door 20.

The top of the shell 5 is provided with the hood ZI which has amultiplicity of openings therein 5o from which pipes extend to variousparts of a house or other building.

Extending through the rear wall 8 is the iiue pipe 23. Extending intothe lower portion of the shell 5 at the rear wall 3 is the air inletconduit 5 24 which extends to the shell III. A drawer 26 has its outerend wall disposed directly under the side wall of the shell I0, throughwhich the drawer is movable. The drawer has a handle 26a and is slidableon the guide or rib 21. A closure plate 26 having a handle 28 isprovided for the drawer 5 opening.

One side wall 6 is also provided with the door 28 which can be opened topermit access to the water-containing pan 29 which serves as ahumidiiier. l

The lower portionvof the side of the shell I0 opposed to the shell 9 hasthe opening 30 therein within which is mounted the motor-driven fan 3 I.This fan serves to pull air from the pipe 24 and force the same upwardlyover the humidifying pan l 29 and upwardly through the heat tubes I3where the air is thoroughly heated and passes to the hood 2l.

As shown in Figure 2, the upper end of the baille plate is hingedlyconnected as at 32 to 20 the top of the shell III and a. hand lever 33connects at its inner end pivotally as at 34 to the lower portion of thebaffle and extends through the wall of the shell I0 and the rear 'wall 8of the shell 5. This hand lever 33 has ratchet teeth 35 25 forengagement with the edge portions of the lastmentioned wall at theopenings 36. Thus with the use of this hand lever 33, the baille plate25 can be held in any desired adjusted position for retarding orpermitting free passage of the products of combustion from the heat tubeI3 to the flue 23.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand ma- 35 terials may be resorted to without departing from the spiritand scope of the invention as claimed hereinafter.

Having described the claimed as new is:

l. A heating furnace comprising an external shell, a pair of internalshells mounted within the external shell, a fire box in one of theshells, a vertically mounted baffle plate in the other invention what isshell, said baille plate being hingedly secured at 5v its upper end tothe upper portion of the corresponding shell, a plurality of products ofcornbustion conveying tubes extending from the re box containing shellto the baffle plate containing shell, the lower free end portion of thebafile o plate depending in the corresponding internal shell to a pointbelow the lowermost products of combustion conveying tubes, said baffleplate containing shell having an outlet at its upper portion and at theopposite side of the baille plate M ing shell, the lower free endportion of the b'fe plate depending in the corresponding internal shellto a point below the lowermost productsv of combustion conveying tubes,said bale plate containing shell having an outlet'l at its upper portionand at the opposite side of the baille plate fromkthe said products .ofcombustion conveying tubes, and a. drawer slidable through an opening inthe outer shell and into the baile'plate con'- taining internal shelland forming.v the bottom l for the last-mentioned shell.

3. Aheating furnace coinprising an external shell, a pair of internalshells mounted within the external shell, aiire box in one of theshells,

a vertically mounted baiile plate in the other s hell, said baille`plate being hingedly secured at its upper end to the upper portion ofthe correspondingshell, a plurality of products of combustion conveyingtubes extending from the re box containing shell to the baille platecontaining shell, the lower free end portion of the baille platedepending in the corresponding internal shell to a point below thelowermost products of combustion conveying tub's, said baille platecontaining shell having an outlet at its upper por v tion and at theopposite side of the baille plate from the said products of combustionconveying tubes, hot air outlets at the top of the outer shell, and anair inlet to the space below the products of combustion conveying tubes.

4. A heating furnace comprising an external shell, ra pair of internalshells mounted within the external shell, a re box in one of the shells,a vertically mounted baille plate in the other shell, said baille plate4being hingedly secured at its upper end to the upper portion of thecorre- 'sponding shell, a, plurality of products of combustion conveyingtubes extending from the're box containing shell to the baile platecontaining shell, the lower free end portion of the baille platedepending in the corresponding internal shell to a point below thelowermost products of combustion conveying tubes, said baille platecon-V taining shell havingan outlet at its upper portion and atttheoppositev sideof the baille plate from they said productsl ofcombustionl conveying tubes, an -elongated member disposed throughopenings" he outer shell .and the baille plate containing shellprovided' with teeth .engageable with theffedges .of 'the shells throughwhich it passes, andi af'pivotal connection between the elongatedmeinber .andthe lower portion of they bale plate.

^ LCLIFTON MAHDRX.

